Gear-casing.



- J. M.' THOMPSON.

GEAR GASING.

APPLIUATION ruim 1111.5, 1910.

1,006,026. Patent-,ea 11111a 17,1911.

JAMES M. THOMPSON, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO `lT'I-IEB,

OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

aus PATENT onirica,

BROS. C0.,

GEAR-CASING- Application filed January 5, 1910.

'l'o all whom it may camcom:

Be it known that I, JAMES M. THOMPSON, a citizen of the United States,residing at Milwaukee, county of Milwaukee, and State of Wisconsin, haveinvented new and useful Improvements in Gear- Casings, of which thefollowing is a specification.

My invention relates to improvements in gear casings, designedespecially for use in manually driven machines, such as grindingmachines, buiiing machines, and the like, wherein power manually appliedto a crank is transmitted to a driven member having a higher speed ofrotation than that of the crank.

The object of my invention is to provide a form of construction in whichthe shafts are supported entirely by one member of a separable casing,the shafts being parallel and projecting from the casing on oppositesides, and the other member' of the casing being capable of removal forthe purpose of removing or inserting gears without disturb ing therelative positions of the shafts or the relation of the gear wheels toeach other.

In the following description, reference is had to the accompanyingdrawings, which illustrate my invention as applied to a manually drivengrinding machine.

Figure 1 is a side elevation of my invention as it appears when appliedto a supporting shelf, the latter being shown in section. F ig. 2 is afront elevation of the same. Fig. 8 is a detail side view of the casingwith the detachable member removed and with the main portion of thecasing partially broken away to show the inter-meshing gear wheel andpinion. Fig. 4 is a sectional view drawn on line of Fig. 3. Fig. 5 is aplan view.

Like parts are identified by the same reference characters throughoutthe several views.

The major portion or body of the casing comprises the side wall 1,peripheral wall 2 and an inwardly projecting portion or flange 3, whichpreferably extends annularly about the margin of the peripheral wall 2.This fiange 3 is provided with a tubular boss 4t, which projectsoutwardly from the face of the flange and receives a tubular bearingmember 5 through which a shaft rod 6 eX- tends, this rod being providedat its inner end with a pinion 7 within the casing. A washer 8 isinterposed between the pinion and the bearing member 5. This bearingSpecification of Letters Patent.

Patented Oct. 1'7, 1911. Serial No. 536,491. i

member 5 may be secured in the tubular boss f1 by means of a set screw9, which may also serve to connect a supporting collar 10 with the boss4. This supporting collar may be provided with suitable fork arms 11, towhich tool rests 12 may be secured. A grinding wheel or other rotatablemember 13 may be mounted upon the shaft rod 6, to which it is connectedby means of a threaded nut 14. The side wall 1 of the casing is alsoprovided with a tubular boss 15, which projects both inwardly andoutwardly from the wall of the casing and within the casing isinteriorly enlarged to receive a bushing 16. The driving shaft 17extends through this tubular boss 15 and bushing 16 and at its outer endis provided with a crank 18.

The inner portion of the boss 15 extends entirely through the body ofthe casing and projects from this portion of the casing through thelarge circular aperture with which the body of the casing is provided onthe side occupied by the fiange 3. The shaft 17 extends through thisportion of the boss 15 and through the bushing 16 and a large gear wheel20 is mounted upon this projecting end of the shaft. This gear wheel isprovided with a conical central portion or web, adapted to support theperipheral teeth 21 within the body of the casing and in a position tomesh with the teeth of the pinion 7. This gear wheel is covered, andtheopening in the casing body is closed, by a removable wall 22, which may,if desired, be formed of sheet metal having sufficient resiliency topermit it to be sprung into position with its margin engaging the marginof the flange 3. The flange 3 may, if desired, be provided with lugs 24at suitable intervals, adapted to facilitateV holding' this wall of thecasing in position, when the margin of the wall is engaged resilientlyback of such lugs.

The body of the casing is composed of cast metal and the flange 3 isprovided with outwardly projecting arms 25, these arms being preferablylocated a little below the shaft 17. It is also provided with anoutwardly projecting arm 26, this arm being located at the bottom of thecasting and substantially mid-way between and below the arms 25. Thisarm receives a clamping set screw 28 of the ordinary type, used forclamping such machines to a supporting table or stand.

From the foregoing it will be observed that not only both the shafts 6and 17 but also the clamping arms 25 and 26 are supported directly by anintegral casting. Vith this construction, when the shaft apertures areonce drilled to receive the respective shafts in parallel positions, theshafts and gear wheels may be removed and replaced at pleasure and theparts of the casing separated for the purpose of so doing, without anydanger of interfering with the alinement of the shafts, or the propermeshing of the gears. To remove the gears, it is merely necessary tofirst remove the casing member 22, after which the gear wheel 2O may bedrawn away from the shaft 17 and removed, the aperture in the body ofthe casing being sufficiently large to permit such removal. The shaft 17may then be removed. Ihe shaft 6 may be removed by releasing the setscrew 9, whereupon both the shaft and the bushing or bearing member 5may be withdrawn with the pinion 7 If desired, however, the shaft 6 maybe withdrawn from the pinion 7 to which it is feathered, withoutremoving the bushing 5 and the pinion 7 may then be removed from thebody of the casting through the same opening that permits the insertionand removal of the gear wheel 20.

I-Iaving thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A gear casing consisting of the con bination of an integrally formedmember having an interior cavity and an opening in one side wallcommunicating with said cavity, a removable member fitting said opening,and a pair of substantially parallel bosses extending in the samedirection from the respective side walls of the integrally formedmember, and provided with parallel shaft apertures; said side wallaperture be ing of sufficient size to permit the insertion and removalof the gearing.

2. A gear casing comprising a side wall l provided with an inwardlyprojecting, centrally located boss, a peripheral wall having an inturnedflange constituting a part of the opposing side wall, and provided withan outwardly projecting boss, and a removable l wall portionconstituting the remaining portion of the Wall of which said flange is apart; said tubular bosses being provided with parallel shaft apertures,and the bosses,

peripheral wall portions, flange, and first mentioned side wall, beingintegrally formed.

3. A gear easing consisting in the combination of two separable parts,one of said parts being provided with parallel shaft bearings onopposing side walls, and arranged .to wholly support the mechanism forwhich the casing is designed, and the other of said parts being whollyindependent of the mechanism in the casing, and detachably connectedwith the Erst mentioned part.

4L. A gear casing comprising a side wall provided with an inwardlyprojecting, centrally located boss, a peripheral wall having an inturnedflange constituting a part of the opposing side wall, and provided withan outwardly projecting boss, and a removable wall portion constitutingthe remaining portion of the wall of which said flange is a part; saidtubular bosses being provided with parallel shaft apertures, and thebosses, peripheral wall portions, flange, and first mentioned side wall,being integrally formed, and said removable wall portion being conicalwith the inwardly projecting boss extending into the apeX of the cone.

5. A gear casing consisting in the combination of two separable parts,one of said parts being provided with parallel shaft bearings onopposing side walls and arranged to wholly support the mechanism forwhich the casing is designed, and the other of said parts being whollyindependent of the mechanism in the casing, and detachably connectedwith the first mentioned part, said shaft bearing part being alsoprovided with outwardly projecting integral clamping arms, and one ofsaid arms having a movable clamping member.

In testimony whereof I aiiix my signature in the presence of twowitnesses.

JAMES M. THOMPSON.

Witnesses:

LnvnRnTT C. VHEELER, I. D. BREMER.

Copies of this patent may be obtained for five cents each, byaddressing' the Commissioner of Patent Washington, D. C.

